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TMP1782 Ò»¿îÏßÐÔ16ͨµÀ£¬´ø×Ô˳Ӧ·´Ïì¿ØÖÆºÍCAN²î·Ö½Ó¿ÚµÄµÍ±ßLEDÇý¶¯Æ÷

2025-09-12 17:29

TMP1782

ÊÇÒ»¿îרÃÅΪÆû³µ¶¯Ì¬ÕÕÃ÷Ó¦ÓöøÉè¼ÆµÄLEDÏßÐÔºãÁ÷Çý¶¯Æ÷£¬µ¥¿ÅоƬӵÓÐ16¸öͨµÀ£¬Ã¿Í¨µÀ¶î¶¨µçÁ÷¸ß´ï 200mA£¬µçÁ÷¾«¶È¡À5%£¬TMP1782¿ÉÒÔÖ§³Ö16·PWM×ÔÁ¦µ÷¹â£¬Ã¿¸öͨµÀ¶¼¿ÉÒÔ×ÔÁ¦¾ÙÐÐ12λPWMµ÷¹âºÍ6λAnalogµ÷¹â£¬ÆäÖÐPWMµ÷¹âƵÂʿɱà³Ì£¬×î¸ß¿ÉµÖ´ï1kHz¡£

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TMP1782

¾ßÓÐ×Ô˳Ӧ·´Ïì¿ØÖÆ (AFC) ¹¦Ð§£¬ïÔ̭ϵͳµÄÈÈÏûºÄ£¬¿É×î´óÏ޶ȵØÌá¸ßϵͳЧÂÊ¡£Æäǰ¶ËµÄ½µÑ¹ÎÈѹÆ÷µÄÊä³öµçѹ¿Éʵʱµ÷½â£¬ÒÔʹͨµÀÉϵĵçѹ¼á³ÖÔڼĴæÆ÷É趨µÄˮƽÉÏ£¬Èç200mAʱ¾»¿Õµçѹ300mV¡£

TMP1782

¾ßÓÐÓÅÒìµÄÎÂÉýÌåÏÖ£¬³£ÎÂTa= 25¡æ£¬Pd=3.04W£¬ÎÂÉý½ö64.4¡æ¡£²âÊÔÌõ¼þ£ºTa= 25¡æ£¬VP& EN = 6.5V, ISET = 200mA(3k?),  VLED1 ¨P 0.95V£¬TMP1782´îÔØÔÚEVBÉÏ¡£

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1.VLED1~16 = 0.625V, ILED = 3.2A£¬Pd=0.625V * 3.2A = 2.00W

2.VLED1~16 = 0.9375V, ILED = 3.2A£¬Pd=0.9375V * 3.2A = 3.00W

3.VLED1~16 = 1.25V, ILED = 3.2A£¬Pd=1.25V * 3.2A = 4.00W


 

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